What are the three books that the creature reads and what does he learn from each?

Answers
2

From the history of the cottagers, the creature learns to admire virtue and despise vice. His education is greatly furthered by his discovery of an abandoned leather satchel, in which he finds three books: Milton's Paradise Lost, Plutarch's Lives, and Goethe's The Sorrows of Young Werther. He regards these books as his treasures, and they are of infinite importance to him: they alternately transport him to the highest ecstasy and cause him the most crushing despair.

The creature is enthralled with Werther's meditations upon death and suicide; with Plutarch's elevated regard for the heroes of past generations; and with the grand themes presented in Paradise Lost. He reads all of the books as though they were true histories, and regards Milton's story of the struggle between God and his creations as completely factual. In his mind, the biblical story defines his own. He does not see himself as Adam, however, but as Satan: unlike Adam, he is alone, without a Creator to protect him or an Eve to sustain him. He is full of envy, wretched, and utterly an outcast.